Answers of prediction to interval voltages in electrical circuits(Duplicates possible).
| Circuit switch | Interval | Correct answers(%) | |||
| Elementary & Middle school(12) | High school (22) | Pre-service teachers(11) | Total (45) | ||
| Open | a-b | 2(16.7%) | 10(45.5%) | 6(54.5%) | 18(40.0%) |
| b-c | 2(16.7%) | 11(50.0%) | 5(45.5%) | 18(40.0%) | |
| c-d | 0(0.0%) | 0(0.0%) | 0(0.0%) | 0(0.0%) | |
| d-e | 10(83.3%) | 20(90.9%) | 11(100.0%) | 41(91.1%) | |
| e-a | 3(25.0%) | 10(45.5%) | 2(18.2%) | 15(33.3%) | |
| Average | 3.4(28.3%) | 10.2(46.4%) | 4.8(43.6%) | 18.4(40.9%) | |
| Close | a-b | 0(0.0%) | 3(13.6%) | 2(18.2%) | 5(11.1%) |
| b-c | 3(25.0%) | 10(45.5%) | 5(45.5%) | 18(40.0%) | |
| c-d | 0(0.0%) | 3(13.6%) | 1(9.1%) | 4(8.9%) | |
| d-e | 0(0.0%) | 2(9.1%) | 2(18.2%) | 4(8.9%) | |
| e-a | 9(75.0%) | 17(77.3%) | 9(81.8%) | 35(77.8%) | |
| Average | 2.4(20.0%) | 7.0(31.8%) | 3.8(34.5%) | 13.2(29.3%) | |